| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a self-feeding power line sensor for monitoring the state of the inside and surrounding of an AC power line by the non-penetration method. SOLUTION: A power line sensor consists of means (sensors 51, 52, 53, and 54) that are arranged near an AC power line 12 and monitor the state of the inside or surrounding of an AC power line 12, a means (microcontroller 48) that is a means being connected to the monitoring means (sensors 51, 52, 53, and 54) and receiving a signal for indicating the monitored state and determines a nominal state level by averaging the received signal with a certain time period, and a means (microcontroller 48) that is arranged near the AC power line 12, responds to the above reception means, and detects the amount of change from the above nominal level.</p> |
